狭小空间盾构横通道平移的侧向始发技术与创新

Lateral Origination Technology and Innovation for Shield Transverse Channel Translation in Narrow Spaces

为了解决繁华城区没有足够的空间使盾构满足正线始发条件,或为满足盾构正线始发条件需要付出高昂施工成本的难题,以北京地铁昌平线南延工程02段为项目研究背景,研究分析了盾构机在狭小空间横通道平移始发时的几种侧向施工技术,对比了不同的侧向始发方案在实际工程中的特点,创新性地提出了一套新型盾构侧向始发施工技术(获专利)并顺利应用。该技术通过异形钢套筒解决了平移横通道斜开造成的盾构始发面与正线不垂直的技术难题;并通过研究始发钢套筒内填料配方技术,保证了盾构机始发均衡切削,解决了在城市高密度建筑区,由于用地紧张、施工成本高昂等所产生的一系列施工问题,为现代化城市盾构始发施工,提供了一种新思路、新方向。

In order to solve the problem of insufficient space in bustling urban areas to meet the starting conditions of the main line for shield tunneling,or the high construction costs required to meet the starting conditions of the shield main line,this paper takes the section 02 of the south extension project of the Beijing Subway Changping Line as the background,researches and analyzes several lateral construction techniques of shield starting by transverse channel translation in the narrow space,and compares the characteristics of the different lateral starting programs in the actual project.A set of new shield lateral starting construction technology(patented)is innovatively proposed and successfully applied.This technology solves the technical problem that the shield starting surface is not perpendicular to the main line caused by the diagonal opening of the translating cross channel by means of special shaped steel sleeve;and ensures the balanced cutting of the shield machine starting by researching the filler formulation technology in the starting steel sleeve,solves a series of construction problems in the high⁃density urban construction area due to the land tension and high construction cost,and provides a new idea and a new direction for the shield starting construction in modernized cities.